Hook adapter



June 6, 1939. Hl LINDSAY 2,161,259

HOOK ADAPTER Filed March 28, 1938 HIH lll vrus Patented June 6, 1939 UNITED STATES PATE HOOK ADAPTER Y Henry Lindsay, Bradford, England, assignor to Henry Lindsay Limited, Bradford, England Application Ma1ch'28, 1938, Serial No. 198,564

In Great Britain July 14, 1937 f 7 Claims.

- This invention relates to hook Aadapters for bolts applicable also vfor clamping girders and the like together and has for its chief object to improve the construction of hook adapters as set forth in the specifications Aof, my British Pat ent Nos. 411,400 and 461,953. f

According to the present invention the hook adapter is provided with one or more spurs in lieu of or in addition to the 'rigid depending prom jection' or abutment which spurs are adaptedto bend onipressure being applied to the securing nut when that portion of the adapter cornes into engagement with or grips the work in connection with which the hook adapted is used. Y

In order that the invention may be clearly understood and readily carried into effect, the same will .now be more fully described with reference to and by the aid of the embodiments illustrated in the .accompanying drawing; wherein:

ligures` 1, 2, 3 and 4 are respectively a side elevation, .rear end elevation, plan and an inverted plan yof a hook adapter yhaving a resilient or `bendable spur at its rear end in lieu of a rigid boltengaging abutment.

,.Figures v5 and 6 are sectional elevations illustrating the application of the hook adapter shown in Figures 1 to VIl inclusive' to the securing of flanged members of Vdifferent thicknesses to a-base or plate. f

Figures 7 and 8 illustrate a modification .in which the hook adapter has lateral spurs and an adjustable abutment in the form of a set screw.

Figures 9-and 10 are respectively a side elevation and a rear elevation of a hook adapter hav- 35 ing a spur orspurs together with a'rigid depending abutment.

Referring to Figures 1 to 6 inclusive of the drawing, the hook adapter orclamp for a bolt comprises a thick metal washer-like member I 40 having a rectangular hole at 2 to take the bolt 3, with either a round or a square neck, and a forwardly extending hook portion 4 which is transversely serrated or ridged at 5 on its undern side'to engage and grip the flange 6 of the mem- 45 ber which is to be clamped to the bed or plate member 1 through which the bolt passes. The upper face kof the hook adapter is recessed to aiord on three sides an upstanding wall 8 within which the bolt head 9 is accommodated so as to be 5o prevented from turning relatively to the hook adapter. This recess may be omitted from the design or else it may be lled with a deep washer for cases where a nut comes against the adapter l or where the head of bolt or Screw must be al- 55 lowed to turn.

The hook adapter is formedv at its lrear end l with a depending spur II of Aa resilient or bendable nature and of such a length to enable `the hook adapter to be employed for holding or clamping flanges -6 -or articles which vary in thickness, said spur II Abending -as the nut on the bolt is screwed or tightened fully into position, so as to afford support on the side remote from the hook -portion Aland thereby ensure va iirmer and secure locking of the hook adapter in position. The `spur II `is preferablypof thinner material than the body Yof the ladapter or clamp I and engages the bed .or plate "I, so that when the parts are being applied, it is bent to constitute a support for the side of the clamp opposite the projection 4. 1 .The resistance set up by the resilient spur I-I `thus serves to resist anytendency of the nut to unscrew should the work Aor bolt in connection with'which fthe hook .adapter -is used be subjected tovibration.-

In the modificationsillustratedin lFigures '7, 8 and 110 the hook adapter I is formed near its rear end with oppositely directed lateral spurs -I Ix, one oneachvside, .andin the construction shown -in Figures 7 :and 8 the hook adapter I is provided in its rear end, between the spurs IIX with a set screw I2 which when the bolt has lrbeen tightened up, can be adjusted to engage or bear upon the surfaceof the bed or plate I through which A'the bolt passes. As an alternative one or other of the resilient spurs II or IIX may be 'adapted to receive a setv screw or theflike to afford a rigid abutment when the bolt has been tightened u to deliect or bend the spur or spurs.

In the VFigure embodiment, the rear end of the hookadapter I is formed between the lSpurs I Ix with a depending rigid abutment or solid fheel portion I 2x -to take the nal pressure when the side spurs I IX have been spread or tbent under pressure.

In Figure 9 the fhook adapter I is formedwitha rearwardly extending spur I I in conjunction with a ysolid -heel portion I2x which -mayor may not have a set-screw-tted thereto.

In forming a connection between two-members say a girder and a. plate, whereitfis desirable Vfor the hook end of the adapter or-c1ip'to be adjustable to suit variationsin the slope of `thefgirder or rail, theadapterfor clip may be provided with aLdeflectable spur or spurs at the front Iand/or sides in addition to the one at the rear or back. In this way the clip becomes universally adaptable without tilting the surface on which the head or nut of the bolt rests.

With hook adapters made according to the present invention the. varying thicknesses of girder flanges and the like may be provided for and a greater security and efficiency in use of the hook adapter is thereby ensured.

I am aware it has been proposed to employ spring steel clamping plates below the nuts or anchoring bolts for securing rails to sleepers or bed plates, said clamping plates being curved to give a resilient grip upon the parts engaged.

I claim:

l. In combination with two members, fastening means for firmly securing the members together, said means including a clamp having a rigid projection on one side for engaging one of said members and a depending exible spur on the side opposite to said projection for engaging the other of said members, said spur being of thinner material than the body of the clamp, said clamp and the spur engaging member having registering openings, and a threaded bolt extending through said openings and having an enlarged head arranged to engage the clamp when a nut is threaded to the free end of the bolt, said spur when the bolt is being applied to the members being bent to provide a support for the side of the clamp opposite the rigid projection.

2. lIn combination with two members of varying thickness, fastening means for firmly securing the members together, said means including a clamp having a rigid projection on one side for engaging one of said members and a depending flexible spur on the side opposite to said projection for engaging the other of said members, said spur being of thinner material than the body of the clamp, said clamp and the spur engaging member having registering openings, and a threaded bolt extending through said openings and having an enlarged head arranged to engage the clamp when a nut is threaded to the free end of the bolt, said spur when the bolt is being applied to the members being bent to constitute'a support for the side of the clamp opposite the rigid projection and also acting to maintain the clamp in tight frictional Contact with the underside of the head of the bolt to prevent the removal of the latter from the members.

3. In combination with two members, fastening means for firmly securing the members together, said means including a clamp having a rigid projection on one side for engaging one of said members and a pair of spaced oppositely extending lateral depending exible spurs on the side opposite to said projection for engaging the other of said members, said spurs being of thinner material than the body of the clamp, said 'clamp and the spur engaging member having registering openings, and a threaded bolt extending through said openings, and having an enlarged head arranged to engage the clamp when a nut is threaded to the free end of the bolt, said spurs when the bolt is being applied to the members being bent to provide a support for the side of the adapter remote from the rigid projection.

4. In combination with two members, fastening means for rmly securing the members together, said means including a clamp having a rigid projection on one side for engaging one of said members and a pair of spaced oppositely extending lateral depending exible spurs on the side opposite to said projection for engaging the other of said members, said clamp and the spur engaging member having registering openings, and a threaded bolt extending through said openings and having an enlarged head arranged to engage the clamp when a nut is threaded to the free end of the bolt, said clamp having an abutment between said exible spurs, said abutment normally being spaced from the spur engaging member and arranged to be brought in contact with the spur engaging member when the bolt is fully applied to the members so as to constitute a stop for taking up the nal pressure exerted by the nut.

5. In combination with two members, fastening means for rmly securing the members together, said means including a clamp having a rigid projection on one side for engaging one of said members and a pair of spaced oppositely extending lateral depending flexible spurs on the side opposite to said projection for engaging the other g* of said members, said clamp and the spur engaging member having registering openings, and a threaded bolt extending through said openings and having an enlarged head arranged to engage the clamp when a nut is threaded to the free end g;

of the bolt, said clamp having an adjustable abutment between said flexible spurs, said abutment normally being spaced from the spur engaging member and arranged to be brought in contact with the spur engaging member when the bolt is fully applied to the members so as to constitute a stop for taking up the iinal pressure exerted by the nut.

6. In combination with two clamping members of varying thickness, fastening means firmly securing the members together, said means including a clamp having a rigid projection on one side for engaging one of said members and a depending flexible spur on the side opposite to said projection for engaging the other of saidmembers, said spur being of thinner material than the body of the clamp, said clamp and the spur engaging member having registeringopenings,and a threaded bolt extending throughsaidopenings and having an enlarged head arranged to engage the clamp when a nut is threaded to the free end of the bolt, said clamp having a polygonal-shaped recess in the top thereof arranged to receive the head of the bolt, said spur when the nut is being fully applied to the bolt being bent to constitue a resilient support for the side of the clamp opposite the rigid projection and also acting to maintain the 'clamp in tight frictional contact with the underside of the head of the bolt to prevent the removal of the latter from the members.

7 In combination with two members, fastening means for rmly securing the members together, said means including a clamp having a rigid projection on one side for engaging one of said members and a depending flexible spur on the side opposite to said projection for engaging the other of said members, said spur being of thinner material than the body of the clamp and arranged to bear against the surface of the spur engaging member, and means for securing the clamp to said members, said spur when the clamp is `being applied to said members bearing against the spur engaging member to provide a support for the side of the clamp opposite the rigid projection,

HENRY LINDSAY.

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